【摘要】 结合DC-DC升压转换器的工作原理,从系统稳定性和负载调整率要求的角度出发,提出了一种新颖的设计方法,以确定误差放大器的主要结构和基本参数.与传统的误差放大器相比,该设计加入了动态电路部分,减少了环路的响应时间.另外,改进的电压移位部分不仅减小了芯片的面积,而且简化了误差放大器的设计.文中设计使用0.5μm-BCD工艺对整个升压转换器系统进行了模拟,并在各种工作条件下对系统进行仿真,得出了理想的仿真结果.更多还原

【Abstract】 Based on the analysis of system’s stability and the demand of load-regulation,a novel method for error-amplifier design is presented.Moreover,a new dynamic circuit is proposed to improve loop transient response.And an improved level-shift is adopted which is helpful to save the die area and simplify the design of error-amplifier.The whole chip is designed with 0.5μm-BCD technology.Simulation results reveal that the system is stable in any case.更多还原